28
= Key1
= Key 2
= Key 3
= Max. value or consumption = Min. value or supply
EMAX
Real power EMAX
For the real power the mean value
real power
EMAX
is build over a programmable measurement
period additionally. Here the measured value „sum
real power“ is summarized each second and divided
by the measuring period time. As a result, each se-
cond a new mean value „real power Emax“ is at
disposal. At the end of a measuring period, the sum
is deleted, and the measuring period starts again.
For the comparison and storage of the monthly
Emax peak values, only that real power Emax is
used, which was measured at the end of a period.
Monthly EMAX peak values
All monthly EMAX peak values are saved for all
EMAX target numbers each month. The old monthly
EMAX peak values are overwritten at the beginning
of a new year.
If the real power EMAX is configurated for the
display software PSW505, real power EMAX can be
indicated in the display of the UMG 505 as well.
The monthly EMAX peak values can be read out
directly at the UMG505 and via the serial interface,
with the software PSW505, for instance.
EMAX target number
Attention!
The „Monthly EMAX peak values“ are
not
indicated in the standard display configura-
tion, when the device is delivered.
Those indications can be configured with the
software PSW505, which belongs to the
contents of delivery.
Pulse input
The measured value „Sum real power“ is calculated
from the measured current and voltage, when the
device is delivered. But if a pulse valence is
assigned to „Digital Input 4“, „sum real power“ is
calculated from pulse number and valence. The real
power of the single phases will be calculated by the
current and voltage, which the UMG 505 measures
furthermore.
Target values
For the EMAX program in the UMG 505, 5 targets
can be given. If no more settings were made, the
target 1 is active. Via the
input channels
1-16 and
via the switching clock, one of the 5 target values
can be selected and assigned to the Emax program.
If a target value is activated via the input channels
and at the same time another via the switching
clock, the target with the highest number (priority)
of Emax program is used.
Please note:
Target number 1 = low
Target number 2 = high
Diagr.: Calculation of mean value for real power
EMAX over a measurement period of 15 minutes.
0
5
10
15
20
25
30 t/Min.
1. Measurement period 2. Measurement period
End of measurement periods
Month
Day . Hour
Minute
W
D.H
M.
L1
L2
L3
Real power EMAX
Peak value
